Just tested out my brand new 7700 along with my month old 990. I put them thru Aaron Copland's Symphony #3, (Mata, Dallas Symph. 1990) CD which I've had for 15 years so I know it extremely well. And now all I can say is WOW! I am going to love this amp already. Today my vintage (mid 80's) JBL 100Ts became new speakers again. Prior, these speakers driven by a NAD 2600PE which I have always thought was a great amp. Now great just got better.